First of 4 international boundary maps; map goes from 123 degrees latitude to 123 degrees along the 49th Parallel; title on map is "International Boundary/ from the Gulf of Georgia/ to the North Western most point of the lake of the woods/ Sheet no. 1/ surveyed uder the direction of/ for the United States C.H. Tittman and C.D. Walcott/ for His Britannic Majesty, W.F. King." Has offical insignias from the US and Britian; it details the boundary at Point Roberts between the New Westminster District and Whatcom County; This is an offical copy of the "quadruplicate set of fifty nine charts under Articles VI and VIII of the Treaty between Great Britian and the United States signed at Washington April 11, 1908." Date of publication is 1913; it is signed by C.H. Tittman, the United States Commissioner and W.F. King, His Britannic Majesty's Commissioner; engraved and printed by the US Geological survey.